/ Dictionary / Index I isopentyl: Meaning and Definition of Find definitions for: i•so•pen•tyl Pronunciation: (ī"su-pen'til), [key] — adj. Chem. isoamyl. Random House Unabridged Dictionary, Copyright © 1997, by Random House, Inc., on Infoplease. isopedin isoperimeter Related Content Daily Word Quiz: hedonist Analogy of the Day: Today’s Analogy Spelling Bee: Today’s Spelling Bee Frequently Misspelled Words Frequently Mispronounced Words Easily Confused Words Writing & Language